Just noticed something interesting about how banking is fundamentally shifting. The infrastructure that defined banking for decades is basically getting replaced by software.

Banks dropped $623 billion on technology last year, and here's the kicker — for the first time, over half of that went to digital banking infrastructure like cloud, APIs, and cybersecurity instead of maintaining physical data centres and branch networks. That's a pretty massive pivot.

The numbers tell you everything. McKinsey surveyed 200 bank CIOs and found 78% plan to move their main workloads to public cloud within five years. That's up from just 35% back in 2020. The acceleration is real.

Why the rush? Cost is one thing — banks migrating to cloud are seeing infrastructure costs drop by 40 to 60% according to Accenture. HSBC alone expects to save $300 million annually once their AWS migration wraps up. But it's not just about money. Banks need to handle 3.6 billion digital banking customers by 2028, and you can't do that with legacy data centre infrastructure.

Capital One shut down all their data centres in 2020 and went full AWS. Their tech operating costs have dropped every single year since. Compare that to fintech platforms that grew 23% annually — they were cloud-native from day one and never had to deal with legacy costs.

Beyond the cloud, the entire architecture is changing. APIs are replacing proprietary banking networks. The UK's Open Banking ecosystem now has 370+ regulated providers and 7 million active users. When someone applies for a mortgage through a broker's website, APIs handle everything — pulling account data, verifying identity, checking credit — all without them stepping foot in a branch.

Digital identity verification is another game-changer. Companies like Onfido and Jumio use AI to verify documents and match them to selfies in under a minute. 85% of new bank accounts in developed markets now open through digital channels. India's Aadhaar system gives digital identity to 1.4 billion people and lets them open accounts in minutes instead of days.

Payment infrastructure is going digital too. Real-time payment systems operate in 70+ countries now. India's UPI processed over 12 billion transactions in a single month last year. Brazil's Pix handled 42 billion for the entire year. The EU's SEPA Instant system is expanding to cover all eurozone banks by 2025. All processing in seconds instead of one to three business days.

So what we're really seeing is banking shifting from physical assets to digital banking infrastructure. It's cheaper, faster to update, and can serve billions without geographic constraints. The vault, the branch, the mainframe — they're being replaced by APIs, cloud instances, and machine learning models. That's not a small change. That's the entire foundation of how banking works getting rebuilt in software.